Abstract: A battery pack (2) for an associated hand-held electric machine tool (1) and for an associated charging device (13) including an analog temperature sensor (3) with a negative temperature coefficient and a temperature measuring interface (4) accessible from the outside. Battery protection electronics (5) arranged in the hand-held electric machine tool (1) and in the charging device (13), which have a battery protection logic (6) and a power switch (8) that is arranged in the circuit path (7) of the battery pack (2) can be influenced. The battery pack (2) is provided with an emergency protection circuit (10), which is connected in parallel with the analog temperature sensor (3) and which, in emergency situations, can actively reduce the total resistance (R) measurable from the outside via the temperature measuring interface (4).

Abstract: An electrical connection arrangement (10) for a battery pack-powered electrical hand-hand tool (2) has an adapter (16) which can be arranged at an electric hand-held tool (2) and which, for the electrical connection of the electric hand-held tool (2) to a battery pack (4), has an electric battery terminal (20) for the connection of the battery pack (4) and an electric hand-held tool terminal (18) for detachable connection of the electric hand-held tool and electrically connected with the battery terminal (20), and an auxiliary device terminal (12) for the electrical connection of the auxiliary device (8) with the battery pack, which auxiliary device terminal (12) can be detached from the auxiliary device (8) and is electrically connected to the battery terminal (20).

Abstract: A charging method for a battery pack with each of the at least two series-connected cells being supplied with an effective charging current (ICharge), in a charging cycle (1) over a charging period, and being supplied with a lower effective refresh current. (Irefresh), in an at least occasional subsequent refresh cycle (2) over a refresh charging cycle (6). The refresh cycle (2) follows after a period (K) in a number (M) of charging cycles (1).

Abstract: A battery pack (4) for a battery operated electric hand tool machine (1) having an electric motor (2) in a machine housing (3), an exchangeable battery pack (4) and a control module (5) with a power electronics (7) for controlling the electric motor (2) and for protecting the battery pack (4). At least the power electronics (7) of the control module (5) are arranged entirely in the exchangeable battery pack (4) and are connected to the electric motor (2) via interface contacts (8).

Abstract: A battery pack (2) for an associated hand-held electric machine tool (1) and for an associated charging device (13) including an analog temperature sensor (3) with a negative temperature coefficient and a temperature measuring interface (4) accessible from the outside. Battery protection electronics (5) arranged in the hand-held electric machine tool (1) and in the charging device (13), which have a battery protection logic (6) and a power switch (8) that is arranged in the circuit path (7) of the battery pack (2) can be influenced. The battery pack (2) is provided with an emergency protection circuit (10), which is connected in parallel with the analog temperature sensor (3) and which, in emergency situations, can actively reduce the total resistance (R) measurable from the outside via the temperature measuring interface (4).

Abstract: A charging station (1) for a rechargeable battery (5) that can be electrically and physically connected to the rechargeable battery (5). The charging station (1) has charger electronics (2) in a charger housing (3) and an electrical and physical contact interface (4) for the battery (5). An air blower (6) producing an air current (L) through two air vents (7a, 7b) is arranged in the charger housing (3). The air vent (7a) of the physical contact interface (4) is spatially associated with the battery (5) and the charger electronics (2) is arranged in the air current (L) to transfer heat. In the cooling process, in a first stage, an air volume (V) at cooling temperature CT is moved past the battery to transfer heat into and onto the battery and, in a second stage, the air volume (V) at an intermediate temperature IT>CT permeates the charger housing (2) containing the charging electronics (2.).

Abstract: An electrical connection arrangement (10) for a battery pack-powered electrical hand-hand tool (2) has an adapter (16) which can be arranged at an electric hand-held tool (2) and which, for the electrical connection of the electric hand-held tool (2) to a battery pack (4), has an electric battery terminal (20) for the connection of the battery pack (4) and an electric hand-held tool terminal (18) for detachable connection of the electric hand-held tool and electrically connected with the battery terminal (20), and an auxiliary device terminal (12) for the electrical connection of the auxiliary device (8) with the battery pack, which auxiliary device terminal (12) can be detached from the auxiliary device (8) and is electrically connected to the battery terminal (20).

Abstract: A charging method for a battery pack with each of the at least two series-connected cells being supplied with an effective charging current (ICharge), in a charging cycle (1) over a charging period, and being supplied with a lower effective refresh current. (Irefresh), in an at least occasional subsequent refresh cycle (2) over a refresh charging cycle (6). The refresh cycle (2) follows after a period (K) in a number (M) of charging cycles (1).

Abstract: A battery-supplied inverter (1) for a brushless electric motor (2) having a plurality of phase windings (3a, 3b, 3c), which is connected in a supply current delta connection (4a) via two supply current lines (5) with a supplying battery (6) having a plurality of battery cells (8), wherein it is connected with the battery (6) in at least one second supply current delta connection (4b, 4c) via supply current lines (5).

Abstract: A charging station (1) for a rechargeable battery (5) that can be electrically and physically connected to the rechargeable battery (5). The charging station (1) has charger electronics (2) in a charger housing (3) and an electrical and physical contact interface (4) for the battery (5). An air blower (6) producing an air current (L) through two air vents (7a, 7b) is arranged in the charger housing (3). The air vent (7a) of the physical contact interface (4) is spatially associated with the battery (5) and the charger electronics (2) is heat-transfer arranged in the air current (L). In the cooling process, in a first stage, an air volume (V) at cooling temperature CT is moved past heat-transferringly into/onto the battery and, in a second stage, the air volume (V) at an intermediate temperature IT>CT permeates the charger housing (2) containing the charging electronics (2.).

Abstract: A charging station (1) for a rechargeable battery (5) that can be electrically and physically connected to the rechargeable battery (5). The charging station (1) has charger electronics (2) in a charger housing (3) and an electrical and physical contact interface (4) for the battery (5). An air blower (6) producing an air current (L) through two air vents (7a, 7b) is arranged in the charger housing (3). The air vent (7a) of the physical contact interface (4) is spatially associated with the battery (5) and the charger electronics (2) is arranged in the air current (L) to transfer heat. In the cooling process, in a first stage, an air volume (V) at cooling temperature CT is moved past the battery to transfer heat into and onto the battery and, in a second stage, the air volume (V) at an intermediate temperature IT>CT permeates the charger housing (2) containing the charging electronics (2.).